X - required number
A, B - natural number
X < 50 and X - even number
A2 < X < B3
Solve:
We can't take number in a square more than 3, because 43=64 (this number is more that 50)
Therefore:
33=27
We select numbers in a square:
12=1 – there are a lot of numbers which fit conditions, but it is necessary to us to pick one number.
Therefore this particular number doesn't approach very well
22=4 - there are a lot of numbers which fit conditions, but it is necessary to us to pick one number.
Therefore this particular number doesn't approach very well
32=9 - there are a lot of numbers which fit conditions, but it is necessary to us to pick one number.
Therefore this particular number doesn't approach very well
42=16 - there are a lot of numbers which fit conditions, but it is necessary to us to pick one number.
Therefore this particular number doesn't approach very well
52=25 –Only one number suits conditions, it means that is a required number = 26
Test:
26>52 and 26<33
26 is an even number
26<50
No other numbers are more suitable than 26
All conditions are satisfied
Answer: 26